Concentration-modulated absorption spectroscopy. II. temporal variation of gain

The application of concentration-modulated absorption spectroscopy, COMAS, to the determination of lifetimes of the electronic states of absorbing species is discussed. The theory behind the lifetime calculations is described and experimental results for lithium in a hydrocarbon flame are reported....

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Bibliographic Details
Published in:Chemical physics 1986, Vol.101 (1), p.127-132
Main Authors: Beaman, R.A., Davies, A.N., Langley, A.J., Jeremy Jones, W., Baran, J.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Atomic properties and interactions with photons
Exact sciences and technology
Intensities and shapes of atomic spectral lines
Physics
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Summary:The application of concentration-modulated absorption spectroscopy, COMAS, to the determination of lifetimes of the electronic states of absorbing species is discussed. The theory behind the lifetime calculations is described and experimental results for lithium in a hydrocarbon flame are reported. The lifetime of the 2p 2P 3 2 , 1 2 and 3d 2D 5 2 , 3 2 states are respectively measured as 528±20 and 216±20 ps for lithium atoms in an ethyne—air flame. The power of the technique in measuring accurately the lifetimes of high-lying thermally excited state species is discussed and areas for further work are suggested.
ISSN:0301-0104
DOI:10.1016/0301-0104(86)87028-8